OpenSSH stands out as the leading tool for establishing remote logins using the SSH protocol. By encrypting all communications, it effectively protects against eavesdropping, connection hijacking, and various attacks. Furthermore, OpenSSH boasts a comprehensive range of secure tunneling features, multiple authentication methods, and advanced configuration options. Remote tasks are facilitated with commands like ssh, scp, and sftp, while key management is handled through utilities such as ssh-add, ssh-keysign, ssh-keyscan, and ssh-keygen. On the server side, components include sshd, sftp-server, and ssh-agent. This powerful software is developed by a small group of contributors from the OpenBSD project and is distributed under a BSD-style license. Although OpenSSH is integrated into numerous commercial applications, very few companies contribute financially to its development. Support for OpenSSH can be directed to the OpenBSD Foundation. Given the vulnerabilities of telnet and rlogin, it is essential that all operating systems come with built-in SSH protocol support. The SSH protocol exists in two distinct and incompatible versions, namely SSH 1 and SSH 2, which can lead to compatibility issues in certain environments. As security becomes increasingly critical, the adoption of OpenSSH continues to grow across various sectors.